This paper presents an overview of methods for solving the problem of creation of the system supporting updatable XML-views over relational databases using query trees and proposes some further ways to extend the set of views supported. The rules of query tree creation proposed for the SQL/XML construction make it possible the realization of such an approach as a module of relational DBMS. In addition, the tool for web-interface development as an example of query tree method implementation is described and a short review of possible areas of implementation of this approach is discussed.

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